[Fot] Al-Fin Drums

Wed Mar 5 14:00:49 MST 2014

Hi John,
I only wrote down the comment in the Moss UK TR2-TR4A catalogue (paga A5)
stating that their circumferential finned Alfin drums are "reproductions of
the rare factory option". Maybe the early (TR2) drums were made like that,
just like other sports cars of that time(Jaguar i.e.)
I used both the Moss drums with rather small radially fins and their later
circumferential finned drums, the latter are much stronger and are
performing better. I believe taht the holes are promoting air circulation in
the drums, the pressure in the brake lines to the rear are 50-60 % higher
than to the front, without brake fadeing (chelated metal linings)
Marcel, Belgium.

  _____  

Van: John Styduhar [mailto:johnstydo at gmail.com] 
Verzonden: woensdag 5 maart 2014 20:27
Aan: Marcel Van Mulders
CC: davehogye; Triumph 'Friends of Triumph
Onderwerp: Re: [Fot] Al-Fin Drums

If you look at page 5 on the Kastner Drive Preparation CD you will see that
the alfin rear drums on the racing TR4 are radially-finned.  The photo
caption says that these were a gift from the factory Competition Department.
So they were using a design similar to the Z-car.   
Hey Kas, can you shed some light on this?  Thanks

On Wed, Mar 5, 2014 at 1:20 PM, Marcel Van Mulders
<van.mulders.marcel at telenet.be> wrote:

Years ago, Moss Europe was selling Alfin drums with radial fins, only good
for looks but not for racing.
Now, Moss is selling Alfin drums with circumferential fins, just like the
factory option : these are very strong and longlasting in racing. I made a
big hole in the backplate (1.5") and a row of 1/3" holes in the drums. I
believe these holes are a great help for cooling by air circulation inside
the drums
Marcel, Belgium
-----Oorspronkelijk bericht-----
Van: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] Namens
davehogye
Verzonden: woensdag 5 maart 2014 16:39
Aan: Todd Redmond
CC: Triumph 'Friends of Triumph
Onderwerp: Re: [Fot] Al-Fin Drums

I think that I removed almost a half inch of material off to clear the
backing plate. The drums were inexpensive and had Centric packaging. I could
get the part number if need be.

Dave H.

----- Original Message -----
From: "Todd Redmond" <alfetta95 at optonline.net>
To: "John Styduhar" <johnstydo at gmail.com>
Cc: "Triumph 'Friends of Triumph" <fot at autox.team.net>
Sent: Wednesday, March 5, 2014 6:57:01 AM
Subject: Re: [Fot] Al-Fin Drums

Yep! That's the loving i meant.
Thanks John.

Sent from my iPhone

> On Mar 5, 2014, at 9:51 AM, John Styduhar <johnstydo at gmail.com> wrote:
>
> II think the loving that Todd was talking about is to enlarge the
> Z-car drum's center hole slightly to slip over the axle hub and to
> machine the outside lip of the stock TR brake backing plate to fit
> into the recess between the drum's steel lining and the aluminum
> casting around the perimeter of the drum. That worked for me.
>
>
>> On Tue, Mar 4, 2014 at 7:22 PM, Robert M. Lang <lang at isis.mit.edu> wrote:

>>
>> Hi,
>>
>> I was putting together a list of "Stuff" for a possible new Triumph
>> racer and I noticed none of the usual places (US suppliers) have
>> al-fin drums listed now...
>>
>> Anyone care to comment on availability?
>>
>> We're talking 9" drums for TR6 and probably TR4.
>>
>> I saw them on the Brit sites, but not on the US web sites.
>>
>> Regards,
>> rml
>> ------------------------------------------------------------
>> ---------------
>> Bob Lang Triumph TR6!! | This space for rent Former NER Solo Chair |
>> Voice:617-253-7438 | Cell: 339-927-4489
>> ------------------------------------------------------------
>> ---------------
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